CN117038374A - Double-station grounding switch with function of rapidly closing short-circuit fault current - Google Patents
Double-station grounding switch with function of rapidly closing short-circuit fault current Download PDFInfo
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- CN117038374A CN117038374A CN202311270445.7A CN202311270445A CN117038374A CN 117038374 A CN117038374 A CN 117038374A CN 202311270445 A CN202311270445 A CN 202311270445A CN 117038374 A CN117038374 A CN 117038374A
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- support arm
- lead support
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- mounting plate
- plate
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- 238000004146 energy storage Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims description 46
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/14—Means for increasing contact pressure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
- H01H21/50—Driving mechanisms with indexing or latching means, e.g. indexing by ball and spring; with means to ensure stopping at intermediate operative positions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
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Abstract
The invention relates to the technical field of high-voltage switches, in particular to a double-station grounding switch with a function of rapidly switching on and off short-circuit fault current, which comprises: the mounting plate is provided with a lead support arm; the connecting seat is matched with the lead support arm, so that the circuit can be connected or disconnected; the clamping assembly can clamp one end of the lead support arm; the triggering mechanism comprises a supporting component and a jacking component which are arranged in a linkage way, and the supporting component is matched with the electromagnetic attraction device; the jacking component comprises an energy storage structure and a supporting structure, when the two assembly clamp components are far away from each other, the energy storage structure stores energy, and when the clamping components move to the stroke end, the energy storage structure releases the energy and drives the lead support arm to deflect through the supporting structure; and the switching assembly can enable one end of the line to be grounded when the lead support arm deflects to the stroke end, so that the grounding switch is disconnected and switched to the grounding station when the line is short-circuited.
Description
Technical Field
The invention relates to the technical field of high-voltage switches, in particular to a double-station grounding switch with a function of rapidly closing short-circuit fault current.
Background
The grounding switch is a mechanical grounding device for releasing static charges of overhauled equipment and circuits and ensuring personal safety of overhaulers in power failure overhauling, and can withstand current for a certain time under abnormal conditions, such as when a circuit is short-circuited; the most typical ground switch is represented as a knife switch, which mainly comprises a clamping contact and a blade, and in order to ensure the connection stability of the clamping contact and the blade, the clamping contact has a certain clamping force to ensure the connection of the blade and the clamping contact, but the friction force between the blade and the clamping contact is very large, so that an overcurrent protection device is difficult to be arranged on the knife switch under the condition, and the use condition of the knife switch is limited, so that the smooth running of a circuit is not facilitated.
Disclosure of Invention
The invention aims to provide a double-station grounding switch with a function of rapidly closing short-circuit fault current, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a double-station grounding switch with a function of rapidly closing a short-circuit fault current, comprising: the device comprises a mounting plate, wherein a plurality of groups of composite insulators are arranged on the mounting plate, and a lead support arm is rotatably arranged at one end, away from the mounting plate, of each composite insulator; the connecting seat is fixed on the mounting plate and matched with the lead support arm, so that a circuit can be connected or disconnected; the clamping assembly is provided with two groups and is arranged on the connecting seat, and the clamping assembly can clamp one end of the lead support arm; the triggering mechanism is arranged on the mounting plate and comprises a supporting component and a jacking component which are arranged in a linkage way, and the supporting component is matched with an electromagnetic attraction device arranged on the mounting plate, so that when a circuit is short-circuited, the two clamping components can be driven to move away from each other; the jacking assembly comprises an energy storage structure and a supporting structure, when the two clamping assemblies are far away from each other, the energy storage structure stores energy, and when the two clamping assemblies move to the stroke end, the energy storage structure releases energy and drives the lead support arm to deflect through the supporting structure; and the switching component is arranged on the mounting plate and connected with the rotating shaft of the lead support arm, and can enable one end of the circuit to be grounded when the lead support arm deflects to the stroke end.
As a further scheme of the invention: the clamping assembly comprises a pressing piece arranged on the connecting seat, at least one transverse shaft penetrating through the connecting seat is fixed on the pressing piece, one end, away from the pressing piece, of the transverse shaft is connected with a connecting plate, and the connecting plate is connected with the opening assembly; and a first spring is sleeved on the transverse shaft, one end of the first spring is connected with the side wall of the connecting seat, and the other end of the first spring is connected with the connecting plate.
As still further aspects of the invention: the expanding assembly comprises a guide piece fixed on the mounting plate, a sliding piece is slidably arranged on the guide piece, a steel balancing weight is arranged on the sliding piece, and the steel balancing weight is matched with an attraction part arranged on the electromagnetic attraction device; a bracket is also fixed on the sliding piece, and two first pulleys are rotatably arranged at one end of the bracket away from the sliding piece; the opening assembly further comprises a side supporting plate fixedly connected with the yoke plate, and the first pulley can roll on the side supporting plate.
As still further aspects of the invention: the side support plate is kept away from one side of yoke plate is formed with No. one straight face, inclined plane and No. two straight faces, no. one straight face, inclined plane and No. two straight faces smooth connection, no. one straight face, no. two straight faces are on a parallel with the side of yoke plate, just No. one straight face with the distance of yoke plate is greater than No. two straight faces with the distance of yoke plate.
As still further aspects of the invention: the support structure comprises a plurality of teeth arranged along the length direction of the sliding part, the teeth are meshed with an incomplete gear rotatably arranged on the mounting plate, the incomplete gear is connected with the energy storage structure, an offset rod is fixed on the incomplete gear, one end of the offset rod, far away from the incomplete gear, is rotatably provided with a third pulley, and the third pulley can roll in a guide chute arranged on the lead support arm.
As still further aspects of the invention: the guide chute comprises an arc-shaped groove body and a straight groove body which are arranged on the lead support arm, wherein the arc-shaped groove body is communicated with the straight groove body, and the circumference radius of the arc-shaped groove body is the same as the distance from the third pulley to the incomplete gear rotating shaft.
As still further aspects of the invention: the energy storage structure comprises a driven disc coaxially and fixedly connected with the incomplete gear and a stagnation-accommodating sleeve fixed on the mounting plate, a telescopic piece is slidably arranged in the stagnation-accommodating sleeve, and a second pulley is rotatably arranged at one end, far away from the mounting plate, of the telescopic piece; and a second spring is further arranged in the stagnation-accommodating sleeve, one end of the second spring is connected with the inner wall of the stagnation-accommodating sleeve, and the other end of the second spring is connected with the telescopic piece.
As still further aspects of the invention: the driven plate is far away from one side of incomplete gear is provided with the extension, the extension orientation one side of driven plate centre of a circle is formed with a position, compression position and No. two positions, no. two pulleys can be in roll between a position, compression position and No. two positions.
As still further aspects of the invention: the switching assembly comprises a connecting sleeve coaxially and fixedly connected with the rotating shaft of the lead support arm, an abutting piece is sleeved in the connecting sleeve in a sliding manner, and a contact is arranged on one side, close to the connecting sleeve, of the abutting piece; the connecting sleeve is characterized in that one end of the abutting part, which is far away from the connecting sleeve, is also connected with a connecting shaft, a grounding terminal is fixed on the connecting shaft, the connecting shaft is in sliding connection with a vertical plate arranged on the mounting plate, a limiting block is arranged on the vertical plate, and the limiting block is in sliding fit with a limiting groove arranged along the length direction of the connecting shaft; the switching assembly further includes a screw drive structure disposed between the connecting sleeve and the abutment.
As still further aspects of the invention: the screw driving structure comprises a screw groove arranged on the side wall of the connecting sleeve and a protruding shaft fixed on the abutting piece, and the protruding shaft can slide in the screw groove.
Compared with the prior art, the invention has the beneficial effects that: through the clamping component and the opening component, the connection stability of the pressing component and the lead support arm is ensured in an initial state, and when a circuit is conducted, circuit breaking caused by unstable connection between the pressing component and the lead support arm and even arc generation at the connection position of the pressing component and the lead support arm caused by poor contact between the pressing component and the lead support arm are avoided, the pressing component or the lead support arm melts at high temperature under the action of high temperature caused by the arc, so that the stability of circuit operation is improved, when the circuit is too large due to short circuit of the circuit, the first pulley drives the two pressing components to be separated from the lead support arm through being matched with the side support plate, so that the circuit is rapidly disconnected, electric equipment and a control device on the circuit are prevented from being damaged, and meanwhile, after the two pressing components are separated from the lead support arm, the lifting component acts on the lead support arm to enable the resistance of the lead support arm to be smaller, and the circuit entering a grounding station is further lower in difficulty; through the jacking component, when the line is over-current, the second pulley is sequentially switched among the first point position, the compression point position and the second point position, and the two pressing pieces are sequentially driven to be separated and the lead support arms are driven to deflect, so that the stability of the line in a disconnection state is improved, the reclosing phenomenon is avoided, the dangerous degree of operation and maintenance personnel in the overhaul process is reduced, the overhaul speed is improved, the duration time of the line in an disconnection state is reduced, and the economic property loss caused by power failure of electric equipment on the line is reduced; through the switching component that sets up for after lead support arm and pressfitting piece separation and deflect to the stroke tip, lead support arm can be in the ground connection state, and make the electrical apparatus of being connected with this circuit lower extreme be in the ground connection state through the wire, can guide the static on the electrical apparatus to subaerial this moment, and prevent to carry electric charge on the lead support arm, so that at the in-process of overhauing, lead support arm is in electroless state, and the security when improving overhauing.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a dual-position grounding switch with a fast short-circuit fault current switching function;
FIG. 2 is a schematic diagram of a dual-position grounding switch with a function of rapidly switching on and off a short-circuit fault current, wherein one of the two-position grounding switch is connected with a ground switch;
FIG. 3 is a schematic diagram of another angular configuration of one of the two-position grounding switches with a function of rapidly switching on and off a short-circuit fault current;
FIG. 4 is an enlarged view of the structure at A in FIG. 2;
FIG. 5 is an enlarged view of the structure at B in FIG. 3;
FIG. 6 is a schematic diagram of a clamping assembly in one embodiment of a dual-position grounding switch with a fast closing short-circuit fault current function;
FIG. 7 is a schematic diagram of a trigger mechanism in one embodiment of a dual-position grounding switch with a fast short-circuit fault current closing function;
FIG. 8 is a schematic diagram of another angle of the trigger mechanism in one embodiment of a dual-position grounding switch with a fast closing short-circuit fault current function;
FIG. 9 is a schematic diagram of a driven disk in one embodiment of a dual-position grounding switch with a fast closing short-circuit fault current function;
fig. 10 is an exploded view of a switching assembly in one embodiment of a dual-position grounding switch with a fast turn-on short-circuit fault current function.
In the figure: 1. a mounting plate; 2. a connecting seat; 3. pressing the piece; 4. a horizontal axis; 5. a first spring; 6. a yoke plate; 7. a side support plate; 701. a first straight surface; 702. an inclined plane; 703. a second flat surface; 8. an electromagnetic attraction device; 801. a suction unit; 9. a steel balancing weight; 10. a guide member; 11. a slider; 1101. teeth; 12. an incomplete gear; 13. a bracket; 14. a first pulley; 15. a driven plate; 1501. a first point location; 1502. compressing the point positions; 1503. a second point location; 1504. an extension; 16. a second pulley; 17. a stagnation-accommodating sleeve; 18. a telescoping member; 19. a second spring; 20. a deflection rod; 21. a third pulley; 22. a lead support arm; 2201. an arc-shaped groove body; 2202. a flat trough body; 23. a connecting sleeve; 2301. a spiral groove; 24. an abutment; 2401. a protruding shaft; 2402. a contact; 25. a connecting shaft; 2501. a limit groove; 26. a vertical plate; 2601. a limiting block; 27. a wire inlet terminal; 28. a wire outlet terminal; 29. and a ground terminal.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1 to 10, in an embodiment of the present invention, a double-station grounding switch with a function of rapidly switching on and off a short-circuit fault current includes: mounting panel 1, connecting seat 2, clamping subassembly, trigger mechanism and switching component, and make earthing switch have the quick short circuit fault current function that closes, improve the stability under the circuit disconnection state, avoid the emergence of reclosing phenomenon, reduce the dangerous degree of fortune dimension personnel at the maintenance in-process, promote the maintenance speed, reduce the duration under the circuit disconnection state, reduce the economic property loss that the consumer has a power failure and bring on this circuit.
The method comprises the following steps: a plurality of groups of composite insulators are arranged on the mounting plate 1, a lead support arm 22 is rotatably arranged at one end, far away from the mounting plate 1, of each composite insulator, the connecting seat 2 is fixed on the mounting plate 1, and the connecting seat 2 is matched with the lead support arm 22, so that a circuit can be connected or disconnected; the clamping assembly is provided with two groups and is arranged on the connecting seat 2, the clamping assembly can clamp one end of the lead support arm 22, the clamping assembly comprises a pressing piece 3 arranged on the connecting seat 2, at least one transverse shaft 4 penetrating through the connecting seat 2 is fixed on the pressing piece 3, one end, away from the pressing piece 3, of the transverse shaft 4 is connected with a connecting plate 6, the connecting plate 6 is connected with the opening assembly, a first spring 5 is sleeved on the transverse shaft 4, one end of the first spring 5 is connected with the side wall of the connecting seat 2, and the other end of the first spring is connected with the connecting plate 6; the triggering mechanism is arranged on the mounting plate 1 and comprises a supporting component and a jacking component which are arranged in a linkage way, the supporting component is matched with an electromagnetic attraction device 8 arranged on the mounting plate 1, and can drive two groups of clamping components to move away from each other when a circuit is short-circuited, wherein an outgoing line end of the electromagnetic attraction device 8 is connected with two pressing pieces 3 through a wire, and an incoming line end is connected with an incoming line terminal 27; the expanding assembly comprises a guide piece 10 fixed on the mounting plate 1, a sliding piece 11 is slidably arranged on the guide piece 10, a steel balancing weight 9 is arranged on the sliding piece 11, and the steel balancing weight 9 is matched with an attraction part 801 arranged on the electromagnetic attraction device 8; a bracket 13 is also fixed on the sliding piece 11, and two first pulleys 14 are rotatably arranged at one end of the bracket 13 away from the sliding piece 11; the opening assembly further comprises a side supporting plate 7 fixedly connected with the yoke plate 6, the first pulley 14 can roll on the side supporting plate 7, a first straight surface 701, an inclined plane 702 and a second straight surface 703 are formed on one side, far away from the yoke plate 6, of the side supporting plate 7, the first straight surface 701, the inclined plane 702 and the second straight surface 703 are connected smoothly, the first straight surface 701 and the second straight surface 703 are parallel to the side surface of the yoke plate 6, and the distance between the first straight surface 701 and the yoke plate 6 is larger than the distance between the second straight surface 703 and the yoke plate 6.
In the initial state, the spring 5 is in a stretched state, and drives the two pressing members 3 to have an abutting force on the lead support arm 22, under the action of the abutting force, the connection stability of the pressing members 3 and the lead support arm 22 is ensured, and when a circuit is conducted, circuit breaking caused by unstable connection between the pressing members 3 and the lead support arm 22 and even electric arc generated at the connection position of the pressing members 3 and the lead support arm 22 caused by poor contact between the pressing members 3 and the lead support arm 22 are avoided, and the pressing members 3 or the lead support arm 22 are melted at high temperature under the action of high temperature caused by the electric arc, so that the running stability of the circuit is improved.
When the current in the line increases instantaneously due to the short circuit, the attraction force generated by the electromagnetic attraction device 8 increases, at this time, the attraction part 801 generates attraction force on the steel balancing weight 9, and is sufficient to drive the steel balancing weight 9 to move towards the electromagnetic attraction device 8 along the length direction of the guide member 10, and to move the bracket 13 connected with the sliding member 11, and the first pulley 14 is rotatably mounted on the bracket 13, so that the first pulley 14 moves along the length direction of the side supporting arm 7, specifically, during the movement of the first pulley 14, the first pulley 14 rolls on the second flat surface 703 first and rolls on the inclined plane 702 when rolling to the end part of the second flat surface 703, and when the first pulley 14 rolls on the inclined plane 702, the two side supporting arms 7 are driven to move away from each other, and the two pressing members 3 are driven to move away from the lead supporting arm 22 through the connecting plate 6 and the cross shaft 4, so that the line is rapidly disconnected, and the damage time of the power consumption equipment on the line due to the short circuit is reduced, and the loss is reduced.
When the first pulley 14 moves from the inclined plane 702 to the first straight plane 701, the distance between the two pressing members 3 is constant, and the distance between the pressing members 3 and the lead support arm 22 is larger than the discharge gap of the circuit, so that continuous electric arc is avoided between the pressing members 3 and the lead support arm 22 after the pressing members 3 are separated from the lead support arm 22.
Further, in the initial state, the first pulley 14 is located at one end of the second flat surface 703 away from the inclined plane 702, when the electromagnetic attraction device 8 generates attraction force due to the over-current generated by the short circuit of the circuit, the steel counterweight 9 can have a certain acceleration time, and when the first pulley 14 moves to the inclined plane 702 to separate the pressing member 3 from the lead support arm 22 so as to disconnect the circuit, the inertia of the steel counterweight 9 can be utilized to enable the first pulley 14 to smoothly roll on the first flat surface 701, so that the circuit is prevented from being connected again due to the fact that the first pulley 14 does not move on the first flat surface 701 and moves reversely along the inclined plane 702 in the process of separating the pressing member 3 from the lead support arm 22, and then the upper process is always repeated, so that other control devices on the circuit are impacted, and damage is caused.
Through the arrangement, the connection stability of the pressing piece 3 and the lead support arm 22 is ensured in an initial state, and the situation that when a circuit is conducted, the circuit is broken due to unstable connection between the pressing piece 3 and the lead support arm 22, even an arc is generated at the connection part of the pressing piece 3 and the lead support arm 22 due to poor contact between the pressing piece 3 and the lead support arm 22, the pressing piece 3 or the lead support arm 22 melts at high temperature under the action of high temperature caused by the arc, so that the stability of the circuit operation is improved, and when the circuit is too large due to short circuit, the first pulley 14 drives the two pressing pieces 3 to be separated from the lead support arm 22 through being matched with the side support plate 7, so that the circuit is rapidly disconnected, electric equipment and control devices on the circuit are prevented from being damaged, meanwhile, after the two pressing pieces 3 are separated from the lead support arm 22, the jacking component acts on the lead support arm 22, so that the resistance when the lead support arm 22 deflects is smaller, and the circuit is more difficult to enter a grounding station.
Specifically, an iron core is disposed inside the electromagnetic attraction device 8, and a wire is wound around the iron core, one end of the wire is connected to the pressing member 3, and the other end is connected to the wire inlet terminal 27.
Referring to fig. 2, 7-10, the jacking assembly includes an energy storage structure and a supporting structure, when the two clamping assemblies are far away from each other, the energy storage structure stores energy, and when the two clamping assemblies move to the end of the stroke, the energy storage structure releases energy and drives the lead support arm 22 to deflect through the supporting structure; the supporting structure comprises a plurality of teeth 1101 arranged along the length direction of the sliding part 11, the teeth 1101 are meshed with an incomplete gear 12 rotatably mounted on the mounting plate 1, the incomplete gear 12 is connected with the energy storage structure, a deflection rod 20 is fixed on the incomplete gear 12, a third pulley 21 is rotatably mounted at one end of the deflection rod 20 away from the incomplete gear 12, the third pulley 21 can roll in a guiding chute arranged on the lead support arm 22, the guiding chute comprises an arc-shaped groove 2201 and a flat groove 2202 which are arranged on the lead support arm 22, the arc-shaped groove 2201 is communicated with the flat groove 2202, and the circumference radius of the arc-shaped groove 2201 is the same as the distance from the third pulley 21 to the rotating shaft of the incomplete gear 12; the energy storage structure comprises a driven disc 15 which is coaxially and fixedly connected with the incomplete gear 12 and a stagnation-accommodating sleeve 17 which is fixedly arranged on the mounting plate 1, a telescopic piece 18 is slidably arranged in the stagnation-accommodating sleeve 17, a second pulley 16 is rotatably arranged at one end of the telescopic piece 18, which is far away from the mounting plate 1, a second spring 19 is further arranged in the stagnation-accommodating sleeve 17, one end of the second spring 19 is connected with the inner wall of the stagnation-accommodating sleeve 17, and the other end of the second spring 19 is connected with the telescopic piece 18; the driven plate 15 is provided with extension 1504 on the side that is far away from incomplete gear 12, extension 1504 is towards driven plate 15 centre of a circle's one side is formed with first position 1501, compression position 1502 and No. two position 1503, no. two pulley 16 can be in rolling between first position 1501, compression position 1502 and No. two position 1503.
In the initial state (the lead support arm 22 is in the abutting state with the pressing member 3), the second pulley 16 is at the position of the first point 1501, the second spring 19 is in the compressed state, the third pulley 21 is at one end of the arc-shaped groove 2201 away from the flat groove 2202, so that the lead support arm 22 is kept in the abutting state with the connecting seat 2, the stability of the lead support arm 22 in the line on state is improved, in this state, under the meshing effect of the teeth 1101 and the incomplete gear 12, the position state of the sliding member 11 is more stable, the position state of the first pulley 14 is further stable, and the position stability of the pressing member 3 in the circuit on state is improved.
The distance between the second point position 1503 and the center of the driven disc 15 is greater than the distance between the first point position 1501 and the center of the driven disc 15, and the distance between the first point position 1501 and the center of the driven disc 15 is greater than the distance between the compression point 1502 and the center of the driven disc 15, so that when the driven disc 15 rotates to make the second pulley 16 move from the first point position 1501 to the compression point 1502, the elastic force of the second spring 19 needs to be overcome, and in the normal state of the line current, the electromagnetic attraction device 8 also generates a certain attraction force, but the attraction force is smaller, and the elastic force of the second spring 19 cannot be overcome, so that the state of the steel balancing weight 9 is more stable when the line current is normal; when the line is over-current, the attraction force generated by the electromagnetic attraction device 8 will increase instantaneously, at this time, the steel balancing weight 9 will move, and drive the teeth 1101 to move through the sliding piece 11, and the teeth 1101 and the incomplete gear 12 are in the meshed state, so that the incomplete gear 12 rotates, when the incomplete gear 12 rotates, the incomplete gear 12 will drive the deflection lever 20 to rotate on the one hand, and drive the driven disc 15 to rotate on the other hand, when the driven disc 15 rotates to make the second pulley 16 move from the first point 1501 to the compression point 1502, the second spring 19 will be compressed further, and meanwhile, the third pulley 21 disposed on the deflection lever 20 will also move in the arc-shaped slot 2201, and because the circumference radius of the arc-shaped slot 2201 is the same as the distance between the third pulley 21 and the rotating shaft of the driven disc 15, when the third pulley 21 moves in the arc-shaped slot 2201, the lead support arm 22 will be in a stationary state, during which the bracket 13 will move the first pulley 14 and move the two pressing members 3 away from each other to separate from the lead support arm 22, and when the second pulley 16 moves to the compression point 1502, the second spring 19 will release the elastic potential energy and further rotate the driven disc 15 to move the second pulley 16 towards the second point 1503, during which the first pulley 14 moves in the first plane 701 while the third pulley 21 will roll in the flat groove 2202 and deflect the lead support arm 22 to separate from the connecting seat 2, and when the second pulley 16 moves into the second point 1503, the positions of the first pulley 14 and the third pulley 21 will be in a stationary state and the positions of the pressing members 3 and the lead support arm 22 will be stable, ensuring that the line is in a stable disconnected state, the maintenance personnel can conveniently overhaul.
Through the arrangement, when the line overcurrent is realized, the second pulley 16 is sequentially switched among the first point position 1501, the compression point position 1502 and the second point position 1503, and the two pressing pieces 3 are sequentially driven to be separated and the lead support arm 22 is driven to deflect, so that the stability of the line in a disconnection state is improved, the reclosing phenomenon is avoided, the dangerous degree of operation and maintenance personnel in the overhauling process is reduced, the overhauling speed is improved, the duration of the line in the disconnection state is reduced, and the economic property loss caused by power failure of electric equipment on the line is reduced.
Referring to fig. 5 and 10, the switching assembly is disposed on the mounting plate 1 and is connected to the rotating shaft of the lead support arm 22, one end of the rotating shaft of the lead support arm 22 is fixed with a wire outlet terminal 28, the switching assembly can make one end of the wire grounded when the lead support arm 22 deflects to the end of the stroke, the switching assembly includes a connecting sleeve 23 coaxially and fixedly connected to the rotating shaft of the lead support arm 22, an abutment member 24 is slidably sleeved in the connecting sleeve 23, and a contact 2402 is disposed on one side of the abutment member 24 close to the connecting sleeve 23; the end, far away from the connecting sleeve 23, of the abutting piece 24 is further connected with a connecting shaft 25, a grounding terminal 29 is fixed on the connecting shaft 25, the connecting shaft 25 is in sliding connection with a vertical plate 26 arranged on the mounting plate 1, a limiting block 2601 is arranged on the vertical plate 26, and the limiting block 2601 is in sliding fit with a limiting groove 2501 arranged along the length direction of the connecting shaft 25; the switching assembly further comprises a screw drive structure arranged between the connecting sleeve 23 and the abutment 24, the screw drive structure comprising a screw groove 2301 arranged on the side wall of the connecting sleeve 23 and a protruding shaft 2401 fixed on the abutment 24, the protruding shaft 2401 being capable of sliding within the screw groove 2301.
In the initial state, the protruding shaft 2401 is located at one end of the spiral groove 2301 away from the lead support arm 22, at this time, the contact 2402 is located at a state separated from the lead support arm 22, and when the lead support arm 22 deflects to disconnect the line due to overcurrent of the line, the connecting sleeve 23 will rotate along with the rotating shaft of the lead support arm 22, and the abutting piece 24 can only do linear motion relative to the connecting sleeve 23 under the guidance of the limiting block 2601 and the limiting groove 2501, so that when the connecting sleeve 23 rotates, the abutting piece 24 will move towards the lead support arm 22 under the action of the spiral groove 2301 and the protruding shaft 2401, and after the lead support arm 22 deflects to the stroke end, the contact 2402 on the abutting piece 24 abuts against the lead support arm 22, so that the lead support arm 22 is grounded to the electric appliance at the rear end of the line.
Through the arrangement, after the lead support arm 22 is separated from the pressing piece 3 and deflects to the stroke end, the lead support arm 22 is in a grounding state, and the electric appliance connected with the lower end of the circuit is in the grounding state through the lead, at the moment, static electricity on the electric appliance can be guided to the ground, and the lead support arm 22 is prevented from carrying charges, so that the lead support arm 22 is in a non-electric state in the overhauling process, and the safety in overhauling is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A double-station grounding switch with a function of rapidly closing a short-circuit fault current, comprising: the device comprises a mounting plate (1), wherein a plurality of groups of composite insulators are arranged on the mounting plate (1), and a lead support arm (22) is rotatably arranged at one end, away from the mounting plate (1), of each composite insulator; the connecting seat (2) is fixed on the mounting plate (1), and the connecting seat (2) is matched with the lead support arm (22) to enable a circuit to be connected or disconnected; characterized by further comprising: the clamping assembly is provided with two groups and is arranged on the connecting seat (2), and the clamping assembly can clamp one end of the lead support arm (22); the triggering mechanism is arranged on the mounting plate (1) and comprises a supporting component and a jacking component which are arranged in a linkage way, the supporting component is matched with an electromagnetic attraction device (8) arranged on the mounting plate (1), and the two clamping components can be driven to move away from each other when a circuit is short-circuited; the jacking assembly comprises an energy storage structure and a supporting structure, when the two clamping assemblies are far away from each other, the energy storage structure stores energy, and when the two clamping assemblies move to the stroke end, the energy storage structure releases energy and drives the lead support arm (22) to deflect through the supporting structure; and the switching component is arranged on the mounting plate (1) and is connected with the rotating shaft of the lead support arm (22), and the switching component can enable one end of a circuit to be grounded when the lead support arm (22) deflects to the stroke end.
2. The double-station grounding switch with the function of rapidly closing short-circuit fault current according to claim 1, wherein the clamping assembly comprises a pressing piece (3) arranged on the connecting seat (2), at least one transverse shaft (4) penetrating through the connecting seat (2) is fixed on the pressing piece (3), one end, far away from the pressing piece (3), of the transverse shaft (4) is connected with a connecting plate (6), and the connecting plate (6) is connected with the opening assembly; a first spring (5) is sleeved on the transverse shaft (4), one end of the first spring (5) is connected with the side wall of the connecting seat (2), and the other end of the first spring is connected with the connecting plate (6).
3. The double-station grounding switch with the function of rapidly closing short-circuit fault current according to claim 2, characterized in that the opening assembly comprises a guide piece (10) fixed on the mounting plate (1), a sliding piece (11) is slidably mounted on the guide piece (10), a steel balancing weight (9) is arranged on the sliding piece (11), and the steel balancing weight (9) is matched with an attraction part (801) arranged on the electromagnetic attraction device (8); a bracket (13) is also fixed on the sliding piece (11), and two first pulleys (14) are rotatably arranged at one end, away from the sliding piece (11), of the bracket (13); the opening assembly further comprises a side supporting plate (7) fixedly connected with the connecting plate (6), and the first pulley (14) can roll on the side supporting plate (7).
4. A double-station grounding switch with a function of rapidly closing a short-circuit fault current according to claim 3, characterized in that a first flat surface (701), an inclined plane (702) and a second flat surface (703) are formed on one side of the side support plate (7) away from the yoke plate (6), the first flat surface (701), the inclined plane (702) and the second flat surface (703) are connected smoothly, the first flat surface (701), the second flat surface (703) are parallel to the side surface of the yoke plate (6), and the distance between the first flat surface (701) and the yoke plate (6) is larger than the distance between the second flat surface (703) and the yoke plate (6).
5. A double-station grounding switch with a function of rapidly closing a short-circuit fault current according to claim 3, characterized in that the supporting structure comprises a plurality of teeth (1101) arranged along the length direction of the sliding piece (11), the teeth (1101) are meshed with an incomplete gear (12) rotatably mounted on the mounting plate (1), the incomplete gear (12) is connected with the energy storage structure, a deflection rod (20) is fixed on the incomplete gear (12), a third pulley (21) is rotatably mounted at one end of the deflection rod (20) far away from the incomplete gear (12), and the third pulley (21) can roll in a guide chute arranged on the lead support arm (22).
6. The double-station grounding switch with the function of rapidly closing short-circuit fault current according to claim 5, wherein the guide chute comprises an arc-shaped groove body (2201) and a flat groove body (2202) which are arranged on the lead support arm (22), the arc-shaped groove body (2201) is communicated with the flat groove body (2202), and the circumference radius of the arc-shaped groove body (2201) is the same as the distance from the third pulley (21) to the rotating shaft of the incomplete gear (12).
7. The double-station grounding switch with the function of rapidly closing short-circuit fault current according to claim 5, wherein the energy storage structure comprises a driven disc (15) which is coaxially and fixedly connected with the incomplete gear (12) and a retaining sleeve (17) which is fixed on the mounting plate (1), a telescopic piece (18) is slidably mounted in the retaining sleeve (17), and a second pulley (16) is rotatably mounted at one end of the telescopic piece (18) far away from the mounting plate (1); the novel telescopic device is characterized in that a second spring (19) is further arranged in the stagnation-accommodating sleeve (17), one end of the second spring (19) is connected with the inner wall of the stagnation-accommodating sleeve (17), and the other end of the second spring is connected with the telescopic piece (18).
8. The double-station grounding switch with the function of rapidly closing short-circuit fault current according to claim 7, wherein an extension portion (1504) is arranged on one side, away from the incomplete gear (12), of the driven disc (15), a first point location (1501), a compression point location (1502) and a second point location (1503) are formed on one side, facing the center of the driven disc (15), of the extension portion (1504), and the second pulley (16) can roll among the first point location (1501), the compression point location (1502) and the second point location (1503).
9. The double-station grounding switch with the function of rapidly closing short-circuit fault current according to claim 1, wherein the switching assembly comprises a connecting sleeve (23) coaxially and fixedly connected with a rotating shaft of the lead support arm (22), an abutting piece (24) is sleeved in a sliding manner in the connecting sleeve (23), and a contact (2402) is arranged on one side, close to the connecting sleeve (23), of the abutting piece (24); the connecting sleeve is characterized in that one end, far away from the connecting sleeve (23), of the abutting piece (24) is further connected with a connecting shaft (25), a grounding terminal (29) is fixed on the connecting shaft (25), the connecting shaft (25) is in sliding connection with a vertical plate (26) arranged on the mounting plate (1), a limiting block (2601) is arranged on the vertical plate (26), and the limiting block (2601) is in sliding fit with a limiting groove (2501) arranged along the length direction of the connecting shaft (25); the switching assembly further comprises a screw drive structure arranged between the connecting sleeve (23) and the abutment (24).
10. The double-station grounding switch with a function of rapidly closing a short-circuit fault current according to claim 9, characterized in that the screw driving structure comprises a screw groove (2301) provided on a side wall of the connecting sleeve (23) and a protruding shaft (2401) fixed on the abutting piece (24), the protruding shaft (2401) being capable of sliding in the screw groove (2301).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311270445.7A CN117038374B (en) | 2023-09-28 | 2023-09-28 | Double-station grounding switch with function of rapidly closing short-circuit fault current |
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|---|---|---|---|
| CN202311270445.7A CN117038374B (en) | 2023-09-28 | 2023-09-28 | Double-station grounding switch with function of rapidly closing short-circuit fault current |
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| CN117038374B CN117038374B (en) | 2023-12-08 |
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| CN202311270445.7A Active CN117038374B (en) | 2023-09-28 | 2023-09-28 | Double-station grounding switch with function of rapidly closing short-circuit fault current |
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|---|---|
| CN117038374B (en) | 2023-12-08 |
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